From b62f4daac00303280361924b9cc19b3e27528b15 Mon Sep 17 00:00:00 2001 From: Michael Tuexen Date: Tue, 13 Aug 2013 18:53:19 +0100 Subject: [PATCH] DTLS message_sequence number wrong in rehandshake ServerHello This fix ensures that * A HelloRequest is retransmitted if not responded by a ClientHello * The HelloRequest "consumes" the sequence number 0. The subsequent ServerHello uses the sequence number 1. * The client also expects the sequence number of the ServerHello to be 1 if a HelloRequest was received earlier. This patch fixes the RFC violation. --- ssl/d1_pkt.c | 1 + ssl/d1_srvr.c | 3 ++- 2 files changed, 3 insertions(+), 1 deletion(-) diff --git a/ssl/d1_pkt.c b/ssl/d1_pkt.c index 4464a305d2..39587039aa 100644 --- a/ssl/d1_pkt.c +++ b/ssl/d1_pkt.c @@ -1058,6 +1058,7 @@ start: !(s->s3->flags & SSL3_FLAGS_NO_RENEGOTIATE_CIPHERS) && !s->s3->renegotiate) { + s->d1->handshake_read_seq++; s->new_session = 1; ssl3_renegotiate(s); if (ssl3_renegotiate_check(s)) diff --git a/ssl/d1_srvr.c b/ssl/d1_srvr.c index c628db56ef..d3afec993d 100644 --- a/ssl/d1_srvr.c +++ b/ssl/d1_srvr.c @@ -294,10 +294,11 @@ int dtls1_accept(SSL *s) case SSL3_ST_SW_HELLO_REQ_B: s->shutdown=0; + dtls1_clear_record_buffer(s); dtls1_start_timer(s); ret=ssl3_send_hello_request(s); if (ret <= 0) goto end; - s->s3->tmp.next_state=SSL3_ST_SW_HELLO_REQ_C; + s->s3->tmp.next_state=SSL3_ST_SR_CLNT_HELLO_A; s->state=SSL3_ST_SW_FLUSH; s->init_num=0; -- GitLab